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Assembly in C

java sumatra

Hi all can anyone tell me how to include assembly code in between your C coding. For the sake of simplicity consider the below code and mentioned procedure thereafter which I learn from the A51macro assembler and utility file.

void main()
{
 #pragma asm
  JMP $
 #pragma endasm
  while(1);
}

After this step I am right clicking on my source file main.c and in the Option for... properties I am activating Generate Assembler SRC file and Assemble SRC file. After this step on final rebuilding the target files I am getting list of 2 warnings-
1) UNRESOLVED EXTERNAL SYMBOL symbol C_START
2) REFERENCE MADE TO UNRESOLVED EXTERNAL symbol C_START

Please tell how to eliminate this and get 0 error and 0 warning. Thanks

Parents
  • 0 in reply to Andy Neil

    Hi Andy I had gone through the link mentioned by you in the last message. Thanks it helps me a lot to understand the basics and following the same I able to successfully write a small assembly in a seperate source file. The remaining technique remains the same as mentioned previously.

    Okay now in the link http://www.keil.com/forum/docs/thread17991.asp#msg92653 the 2nd reply given by you mention that the C51 provide peculiar feature which eliminate the need of assembler. See now my requirement needs to write some data on the flash memory during runtime . It require IAP for that I need to access the particular sector in the flash "Is it possible to do without C??"

Reply
  • 0 in reply to Andy Neil

    Hi Andy I had gone through the link mentioned by you in the last message. Thanks it helps me a lot to understand the basics and following the same I able to successfully write a small assembly in a seperate source file. The remaining technique remains the same as mentioned previously.

    Okay now in the link http://www.keil.com/forum/docs/thread17991.asp#msg92653 the 2nd reply given by you mention that the C51 provide peculiar feature which eliminate the need of assembler. See now my requirement needs to write some data on the flash memory during runtime . It require IAP for that I need to access the particular sector in the flash "Is it possible to do without C??"

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